Many bowlers seem to have a problem with a certain bowling pin.
For most its the 10 pin
for some its the 9 or the ( fill in your own pin here) .
Bowlers ask me things to do with a certain bowling pin all the time.
My answer is always the same. Instead of focusing on what you don't want
by saying things to yourself like, " I hope I don't leave the _ pin."
Instead tell yourself " This time I will knock over all the pins including the _ pin."
Then visualize it happening as if you are watching a video of yourself bowling and knocking over all the pins in slow motion.
Soon you will stop leaving whatever bowling pin you have a problem with.
Do it and notice the difference.